If I understand what you're saying, it sounds like it's working right to me. I have one just like it. It has
three lights per bay, right? When I put a battery in that's pretty low, it starts blinking with one light; then as it charges, it'll blink two lights for awhile; then three lights for awhile. When all three lights stay on, that means the battery is all the way charged. Sometimes if I put a battery in that's not completely run down, it'll start with two blinking lights, then go to three, then solid three. Maybe I misunderstood....but if not, sounds like it's working.